<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="refresh" content="3;url=/reg.html">
  <title>注册失败</title>
</head>
<body>
<center>
  <h1>该用户已存在，请<a href="/reg.html">重新注册</a></h1>
  3秒后自动跳转注册页面
</center>
</body>
</html>